Bob Peterson

Is the alarm called fatal - 3a coming up on the alarm better or is it coming from the operating system? If it's coming from the operating system, about all you can do is call Allen Bradley and ask them about it.

Bob Peterson

So I went and looked it up. it appears this message (FATAL - 3A) will appear during the power on self test if a stuck touch cell is detected. It appears the only solution is to replace the display module.